Canada has ratified the UK’s accession to the Comprehensive and Progressive Agreement for Trans-Pacific Partnership (CPTPP), clearing the way for the agreement to enter into force between the UK and Canada on 1 September 2026.
Canada formally ratified the UK’s CPTPP Accession Protocol on 3 July 2026, completing the process required for the agreement to become available for UK–Canada trade.
For Thames Valley businesses, this creates an additional framework for trading with Canada alongside the existing UK–Canada Trade Continuity Agreement (TCA). The introduction of CPTPP could provide new opportunities around tariffs, rules of origin and international supply chains, but businesses will need to assess carefully which agreement offers the most appropriate treatment for their goods.
Greater Flexibility Through Cumulation
One potentially valuable feature of CPTPP is its approach to cumulation.
Under its rules of origin, qualifying materials and production undertaken in other CPTPP member countries may count towards a product’s originating status.
This can provide greater flexibility for businesses with international supply chains involving markets such as Japan, Australia, Malaysia, Singapore, Vietnam, Mexico and other CPTPP members.
For example, a UK manufacturer using qualifying originating components from another CPTPP country may be able to count those materials towards meeting the origin requirements for a finished product exported to Canada.
This could be particularly valuable for Thames Valley manufacturers operating international supply chains and sourcing specialist components from several countries.
However, businesses should not assume that materials purchased from another CPTPP country automatically qualify. The materials must meet the relevant origin requirements, and the finished product must satisfy the applicable product-specific rule of origin.
CPTPP’s wider cumulation provisions differ from the bilateral rules available under the existing UK–Canada arrangements and could therefore create new opportunities for manufacturers reviewing their sourcing and production strategies.
The UK–Canada Trade Continuity Agreement Will Remain Available
The existing UK–Canada Trade Continuity Agreement will remain in effect after CPTPP enters into force between the two countries.
Businesses will therefore have two potential preferential trade frameworks available and will need to assess whether the Trade Continuity Agreement or CPTPP provides the most suitable treatment for a particular transaction.
The most advantageous agreement may vary according to:
- The commodity code and applicable tariff
- The product-specific rule of origin
- The countries from which materials and components have been sourced
- Documentary and origin evidence requirements
- Any relevant tariff-rate quotas or other restrictions
Businesses should compare both agreements rather than automatically changing their current procedures when CPTPP becomes available.
For some products, the existing UK–Canada agreement may continue to provide the most appropriate route. For others, CPTPP’s different origin rules or cumulation provisions could offer greater flexibility.
Origin Evidence Remains Essential
Preferential customs treatment under CPTPP is conditional on the relevant rules of origin being met.
Businesses considering using CPTPP should therefore establish their origin position before issuing origin documentation or instructing a Canadian customer to claim preferential treatment.
This may include reviewing:
- Supplier origin information
- Manufacturing and production records
- The origin of individual components and materials
- Product-specific rules of origin
- Supporting commercial and customs documentation
- Internal record-keeping procedures
Businesses must retain sufficient evidence to demonstrate that their goods qualify.
An incorrect preferential origin claim could result in preference being refused and additional customs duty becoming payable.
For businesses already trading with Canada, the introduction of CPTPP provides a useful opportunity to review existing origin procedures rather than simply switching agreements automatically.
Wider Opportunities for Trade and Investment
The significance of CPTPP extends beyond customs duties and rules of origin.
The agreement includes provisions covering areas such as services, investment, digital trade, regulatory transparency and government procurement.
It also establishes investment protections for qualifying investors operating between participating CPTPP markets.
This wider framework could be particularly relevant to Thames Valley businesses operating in sectors including:
- Aerospace
- Advanced manufacturing
- Technology and digital services
- Professional services
- Financial services
- Environmental industries
- Engineering and specialist manufacturing
For businesses already operating internationally, CPTPP may therefore provide opportunities extending beyond the movement of physical goods.
What Businesses Should Do
Businesses trading with Canada should use the period before 1 September 2026 to review whether CPTPP could provide commercial or operational benefits.
Preparatory work should include:
- Confirming the correct commodity codes for traded goods
- Comparing CPTPP and UK–Canada Trade Continuity Agreement tariff rates
- Reviewing the product-specific rules of origin under both agreements
- Mapping the origin of materials and components within the supply chain
- Establishing whether CPTPP cumulation could assist in meeting origin requirements
- Confirming what origin evidence must be held or supplied
- Updating customs instructions, commercial documentation and internal procedures where necessary
- Discussing the planned use of CPTPP with Canadian customers, suppliers and customs representatives
Businesses should also ensure that any brokers or customs representatives clearly understand which agreement is being used and what supporting evidence is available.
CPTPP preference should not be claimed for UK–Canada trade before the agreement enters into force on 1 September 2026.
TVCC Perspective
Canada’s ratification is a positive development for Thames Valley businesses and strengthens the practical value of the UK’s membership of CPTPP.
While tariff reductions will be important for some businesses, one of the potentially more significant benefits for manufacturers could be the agreement’s approach to cumulation and international supply chains.
Thames Valley businesses frequently operate across complex global supply chains, particularly in sectors such as advanced manufacturing, aerospace, engineering and technology. The ability to take qualifying materials from other CPTPP countries into account when assessing origin could provide greater flexibility around sourcing and production.
However, the introduction of CPTPP should not be viewed as an automatic replacement for the existing UK–Canada Trade Continuity Agreement.
The availability of two preferential trade frameworks means businesses will need to compare the tariff treatment, rules of origin and documentary requirements at product level before deciding which agreement to use.
Companies should therefore use the period before 1 September to review their current Canadian trade flows and ensure that any preferential origin claims are supported by appropriate evidence.
How TVCC Can Help
Thames Valley Chamber of Commerce provides customs consultancy and helpline support covering areas including:
- Commodity classification
- Rules of origin
- Trade preference
- Customs procedures
- Customs declarations
- Origin evidence
- Customs compliance reviews and audits
Businesses should seek advice before changing their customs declarations or origin procedures, particularly where supply chains involve materials or production across several countries.
For support, contact the TVCC International Trade team on 01753 870560 or email trade@tvchamber.co.uk.
For further information and government guidance, please see:
